1: (0 1 15)

(0)(1 20 15 21 4)(2 19 17 13 10)(3 12 11 8 5)(6 9 7)(14 18 16)

2: (4 15 21)

(0)(1 20 15)(2 19 17 13 10)(3 12 11 8 5)(4)(6 9 7)(14 18 16)(21)

3: (2 19 10)

(0)(1 20 15)(2)(3 12 11 8 5)(4)(6 9 7)(10 17 13)(14 18 16)(19)(21)

4: (3 12 5)

(0)(1 20 15)(2)(3)(4)(5 11 8)(6 9 7)(10 17 13)(12)(14 18 16)(19)(21)